<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图区域 -->
    <el-card>
        <!-- 搜索区域 -->
        <el-row :gutter="20">
            <el-col :span="8">
                <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable clear="getGoodsList">
                <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
            </el-input>
            </el-col>
            <el-col :span="4">
                <!-- 点击跳转添加商品页面 -->
                <el-button type="primary" @click="goAddPage">添加商品</el-button>
            </el-col>
        </el-row>
        
        <!-- 表格区域 -->
        <el-table :data="goodsList" border stripe>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="商品名称" prop="goods_name"></el-table-column>
            <el-table-column label="商品价格（元）" prop="goods_price" width="95px"></el-table-column>
            <el-table-column label="商品重量" prop="goods_weight" width="95px"></el-table-column>
            <el-table-column label="创建时间" prop="add_time" width="140px">
                <template slot-scope="scope">
                    {{scope.row.add_time | dateFormat}}
                </template>
            </el-table-column>
            <el-table-column label="操作" width="125px">
                <template slot-scope="scope">
                    <!-- 编辑商品按钮 -->
                    <el-button size="mini" type="primary" icon="el-icon-edit"></el-button>
                    <!-- 删除商品按钮 -->
                    <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeGoods(scope.row.goods_id)"></el-button>
                </template>
            </el-table-column>
        </el-table>

        <!-- 分页 -->
        <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum" :page-sizes="[3, 5, 10, 15]" :page-size="queryInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total="total">
        </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
        //查询参数
        queryInfo: {
            query: '',
            pagenum: 1,
            pagesize: 10
        },
        //保存商品列表信息
        goodsList: [],
        //总数据条数
        total: 0
    };
  },
  created() {
      this.getGoodsList()
  },
  methods: {
    async getGoodsList() {
        //根据分页获取对应的商品列表
        const { data: res } = await this.$http.get('goods', {
            params: this.queryInfo
        })
        if (res.meta.status !== 200) {
            return this.$message.error('获取商品列表失败');
        }
        console.log(res.data);
        this.$message.success('获取商品列表成功');

        this.goodsList = res.data.goods;
        this.total = res.data.total;
    },
    // 当页号发生改变时 更改pagesize，重新请求
    handleSizeChange(newSize) {
        this.queryInfo.pagesize = newSize;
        this.getGoodsList();
    },
    // 当页码发生改变时 更改pagenum，重新请求
    handleCurrentChange(newPage) {
        this.queryInfo.pagenum = newPage;
        this.getGoodsList();
    },
    //删除商品业务逻辑
    async removeGoods(goods_id) {
        //根据id删除对应的参数或属性
        //弹窗提示用户是否确定删除
        const confirmResult = await this.$confirm(
            '请问是否删除该商品',
            '删除提示',
            {
                confirmButtonText: '确认删除',
                cancelButtonText: '取消',
                type: 'warning'  
            }
        ).catch(err => err);
        //如果用户点击确认，则confirmResult 为'confirm'
        //如果用户点击取消, 则confirmResult获取的就是catch的错误消息'cancel'
        if (confirmResult != 'confirm') {
            return this.$message.info('已经取消删除');
        }

        //没有取消 发送请求完成删除
        const { data: res } = await this.$http.delete(`goods/${goods_id}`);

        if (res.meta.status !== 200) {
            return this.$message.error('删除商品失败')
        };
        this.$message.success('删除商品成功');
        this.getGoodsList()
    },
    //路由导航到商品页面
    goAddPage() {
        this.$router.push('goods/add');
    }
  },
};
</script>

<style lang="less" scoped>
</style>